Adjustable sight for firearms



W, B35. o; W. RINGQUls-r 2,024,779

' ADJUSTABLE SIGHT FOR FIREARMS Filed April s, 193s f Sg? y HHHHHHHPatented Dec. 17,- 1935 UNITED STATES PATENT OFFICE ADJUSTABLE SIGHT FORFIREARMS Application April 3, 1933, Serial No. 664,120

6 Claims.

The present invention relates to an adjustable sight for firearms andparticularly to a rear sight for revolvers which provides an adustmentboth for windage and for elevation.

In prior devices of this character, an adjustable sight has required theprovision of at least two adjusting members, such as screws, one ofwhich adjusts for windage and the other for elevation. The provision ofa plurality of screws makes the sight relatively complicated and bulky,as well as expensive to manufacture. It is accordingly the principalobject of the present invention to eliminate the objections of priorconstructions by providing for adjustments both for windage andelevation by a single screw. The invention permits the construction ofan extremely simply sight which may be produced at a 10W cost and whichis quickly and easily adjusted.

Other and further objects and advantages of the invention will appearfrom the following detailed description taken in connection with theaccompanying drawing in which:-

Fig. 1 is a fragmentary elevation of a portion of a revolver showing thenovel sight in position thereon.

Fig. 2 is an enlarged elevation of a sight and sight holder embodyingthe invention.

Fig. 3 is an enlarged fragmentary plan view of a portion of the sightand sight holder.

Fig. 4 is an enlarged end elevation of the sight and sight holder.

Like reference characters refer to like parts in the different figures.

Referring first to Fig. 1, the revolver I has a barrel 2, to the forwardend of which the front sight 3 is secured. The reinforcing raised rib 4on the barrel projects rearwardly of the cylinder 5 of the revolver, andthe rear sight holder 6 is carried by the end of said rib on a screw 'Iwhich projects transversely through. said rib. The central portion 8 ofthe sight holder is received in a longitudinal vertical slot in the rib4 and has an opening 9 through which thescrew 'I passes. The forward endof the portion 8 of the sight holder is formed in the usual manner andcooperates with a spring-pressed plunger, not shown, positioned in therib 4 which latter supports the sight holder in the position shown inFig. 1.

According to the present invention, the body of the sight holder 6 issubstantially T-shaped in plan view, as shown in Fig. 3, with thecentral portion 8 of the holder forming the leg of the T. The cross barI0 of the holder, which is integral with the portion 8, is provided atopposite ends with parallel extending knurled grips I I by which thesight holder is actuated to permit breaking open of the revolver andejection of the empty shells in the cylinder. The rearward surface I2 5of the cross bar Ill is provided with parallel, closely spaced,horizontal grooves I3 which engage and cooperate with correspondinggrooves I4 on the forward surface of the adjustable sight I5. The latteris held against the surface I2 by a clamp- 10 ing screw I6 whichprojects through an enlarged oblong opening I'I in said sight and whichengages a threaded opening in the cross bar i0. The opening I'I issubstantially larger in width than the diameter of the clamping screw IGto 15 permit relative adjustment of the sight I5 on the surface I2. Theenlarged. head of the screw I6 provides a clamping action between itselfand the surface I2 of the sight holder for holding the sight I5 inadusted position. The member I5 20 is provided in the upper surfacethereof with the usual notch I8 which is used in connection with theforward sight 3 in aiming the revolver.

By a slight loosening of the clamping screw I6, the clamping action isreleased and the sight 25 is movable horizontally parallel to thecooperating grooves, being guided by said grooves on the surface of thesight and on the sight holder. This horizontal movement provides for awindage adjustment, and the extent of this adjustment 1s indicated by aseries of indicating marks 20 on the upper surface of the sight holder.The central indicating mark is longer than the marks on either sidethereof for indicating the central position of the sight. The groovessupport the sight 35 against the vertical movement on said holder duringthe windage adjustment and thus maintain a uniform elevation of thesight independently of the extent of said windage adjustment.

In adjusting for elevation, the clamping screw 40 is loosened to agreater extent to permit the sight to be withdrawn from the grooves inthe holder and said sight is then moved vertically to position theserrations on the sight in different grooves on the sight holder. Theextent of the elevation 45 adjustment is indicated by a series ofnotches 2I in one edge 22 of the sight, and the spacing between thebottom of successive notches 2| corresponds to twice the spacing betweenthe grooves on the sight holder. The notches are positioned 50 so thatthe base of the top notch 2| Will be in alinement with the upper surfaceof the sight holder when the sight is in the lowermost position on saidholder. Vertical adjustment of the sight from its lowermost position, toraise the 55 sight a distance corresponding to the width of one groovein the sight holder, will position the peak 23 between the first andsecond notches 2l in alinement with the upper edge of the sight holder.The notches thus indicate the extent ofthe adjustment for elevation andthe provision of a plurality of notches provides for indicating thevertical adjustment in any position of said sight. The edge 22 vof thesight beneath the notches 2| ischamfered as indicated at 24, so that thenotches 2l are more readily apparent.

From the foregoing, it will be noted that the single clamping screw I6provides for adjustment of the sight l independently for either windageor for elevation, and said screw also maintains one of the adjustmentsin proper position while the other adjustment is being made, therebyeliminating the plurality of adjusting screws necessary in prior artconstructions, and making the sight materially less expensive inconstruction.

I claim, v

l. In a adjustablev sight construction, a sight holder, a sight mountedthereon, parallel coop- Aerating grooves and ridges in adjacent surfacesof said sight and sight holder, a clamping member for holding saidcooperating .grooves Vand ridges in interengagement and for holding saidsight against movement onsaidholder, said sight being adjustable on saidholder parallel to said grooves by a slight release of said clampingmember, and adjustable transversely of ,said grooves by a greaterrelease of said clamping member` y 2. In an adjustable sightconstruction, a sight holder, a sight mounted thereon, said sight havingan opening therein, a clamping screwpr'ojecting throughsaid opening andengaging said holder, said opening being larger than the diameter of thescrew to provide foradjustment of said sight, parallel cooperatinggrooves and ridges in adjacent surfaces of said sight and sight holder,said sight being adjustable on said holder in a direction parallel tosaidv grooves by a slight `release of said clamping screw, andadjustable transversely of said grooves by a greater release of saidclamping screw, the latter normally holding the cooperating grooves andridges in interengagement.

3. In an adjustable sight construction, a sight holder, a sight mountedthereon, saidsight having an opening therein, a clamping screwprojecting through said opening and engaging said holder, said openingbeing larger than the diameter of the screw to provide for adjustment ofsaid sight, interengaging horizontal grooves and ridges in adjacentsurfaces of said sight and sight holder, said sight being adjustablehorizontally on said holder by a slight release of said'clamping screwfor a windage adjustment of `said sight, and adjustable transversely ofsaid grooves by a 5 greater release of said clamping screw for anelevation adjustment of said sight.

4. In an adjustable sight construction, a sight holder, a sight mountedthereon, said sight having an opening therein, a. clamping screw pro- 10jecting through said opening and engaging said holder, said openingbeing larger than thel diameter of the screw to provide for adjustmentof ridges in adjacent surfaces of said sight and 1,5

ysight holder, said sight being adjustable horizontally on said holderby a slight releasel of saidl clamping screw for a windage adjustment ofsaid sight, adjustable transversely of said grooves by a greater releaseof said clamping screw for an elevation adjustment of said sight,'andmeans in the form of notches in said sight for indicating the elevationadjustment of said sight on sai holder.

5. In an adjustable sight construction,'a sight 25 holder, a sightmounted thereon, said sight having an opening therein, a clamping screwprojecting through said opening and engaging said holder, said openingbeing larger than the diameter of the screw to provide for adjustment ofsaid sight, cooperating parallel grooves and ridges in adjacent surfacesof said sight and sight holder, said clamping screw normally holdingsaid grooves and ridges in interengagement, said sight being adjustable`transversely of and yparallel to said grooves, said grooves and ridgesmaintaining one adjustment while the other adjustment parallel to saidgrooves is being made. f y 6. In an adjustable sight construction, asight holder, av sight mounted thereon, said holder and sight eachhaving a plurality of cooperating guide members to provide for movementof said sight in one ldirection in said holder in any one of severalrelative positions of said sight on said holder ,transversely of theguide members, a clamping member for holding said cooperatingguider-members in engagement and for locking said sight againstmovement, said sight being slidable on the sight holder in said onedirection upon slight release of said clamping member, and said sightbeing adjustable transversely of said guide membersupon a greaterrelease of said clamping member.

OTTO W. RINGQU'IST. 55

